Bait for drawing glass cylinders.



81E, MOORE. BMT FOR DRAWING GLASS CYLIND.ERS.

APPucATloN FILED 111111.30. 1909.

A19811111111-May 11, 1915.`

WITH ESSES of the bait the appearance of a rough gear' i messen,

To all whom timely concern:

arena vANiA.

pieetnn of Letters =Batent.

,GEORGE MOORE, 0F ARNOLD, PENNSYLVANIA, SBIGNQR TG PITTEBURG- ELTE GLASS COMPANY, OF PITTSBUEGH, BENNS'LVANA, .l GOBFOBAIION OF Brennernaan rca Daevvrlvsv stese armeniens.

Application me@ March so, 1909. serial no. 486,823.

Be it known that I, GEORGE E. MOORE, a citizen of the United States, residing at Arnold, in the county of Westmoreland and State of Pennsylvania', have invented ce1'- tain new' and useful Improvements in Baits for Drawing Glass Cylinders, of which the following is a specification. l

This invention has for its primary objects, the construction of a bait for drawing glass lcylinders which will secure a better hold on the glass than those forms of construction heretofore used, and which will retain that hold more effectively and for a longer period of time, and without the same liability of breakageor cracking of the glass as it cools.

Ifrorder that the invention n iay be better understood, IA will proceed to describe the same in'connection with the accompanying drawing, whereiny Figure 1 is a side elevation showing a bait constructed in accordance with my improvement, with the upper end of the glass cylinder attached thereto;

Figure 2 is a sectional view on the line II-II of Figure l; v v

Figure 3 illustrates a modified formiof bait with my improvement embodied therein, such last mentioned modification being arranged for the formation of a cylinder with a small neck portion, and y Figure 4, indicates a partial broken view of another detail section. Referring now more particularly to Figure l, it will be seen that the upper end of the cylinder indicated at 4: isshown as attached to a broad extended mushroom shaped part marked 5 that is attached to a pipe 6, the opening 7 whereof extends downward as indicated by the dotted lines, through the lpart 5 to the interior of the cylinder, theouter rim o r periphery ofthe part 5 having a downwardly extending projection circumferentially disposed as indicated at 8.

The outer surface ofthe periphery of the i body 5 of the bait I arrange in the shape of corrugations or scallops as indicated at 9 in Figure 2, said scallops giving the outer circumference of the lower portion of the body wheel, the roots of th`e teeth-whereof and the outer ends of the teeth are curved or rounded as shown, to avoid any sharp edges.

It will be seen on examination of Figure 2 that the glass when in a plastic state will lodge in the depressions or grooves between the adjacent teeth 9, forminfr i thick body- -of the material as indicated at i!) ivhiph wili retain the heat longer and better than the t0 thinner portion indicated at ll which the apex ofthe teeth or projections, and as 'shown in the drawing operation, the color in between the `teeth or ridge, considerably redder and darker thai l ai the f point marked ll, and this i i i tained within the grooves oi c ianneis larger body of glass therein lodged retain the mass in a more plastic tougher condition and renders it l to breakage, besides securing a l on the bait than has heretofore tained by the en'iploynient hat smooth cylir l"ical outer surface. 1 Y have shown hait ha i slightly differentdistribution of ni i the device of Figs. and 2, but being sub stantially similar in all other respects.

As'indicated in Figure et, it is pos slightly. vary the ccniiguiation of the face of the bait or the' construction of same, as for example by the formati@ the depending pais 8 in the sha pentine or convoluted corrngatio. surface conforming somewhat to the surface. It is possible also that other variations in detail could be intro@ ic without departing from the spirit of the i vention, provided the feature of arranging the part of the hait which engages the glass in such. manner as to produce in alternation around the periphery' of the cylinder succession of thicker and thinner parts so that the heat of the larger body of glass in the thicker portions will aid in tempering the balance and retain the heat longer, and prevent greater tendency to crack, where all the glass is thin and cooled rapidly.

Besides the advantages `before specified my improved bait produces a greater thickness ofthe cylinder at the cap or upper end where greater strength is desirable, and thus makes it practicable to increase the length of the draw. y

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is the following:

Cil

A. metal bait for drawing glass cylinders, comprising a body portion provided with an annular Glass engaging portion one side surziee'of ylich is provided with utes extending a portion of the distance to the uppeul` part of the glass engaging portion rund the other surface being substantially smooth.

in testimony whereof have hereunto .signed'my name in the presence of the snbscribed Witnesses.

GEORGE E. MUSEE. Witnesses:

SSH. SRAEL, BAUMER M. ALLEN. 

